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- //
- // testFix.cc : test Fix (variable length) classes
- //
-
- #include <xfix.h>
-
- void check(const char* x, Fix y) { cout << x << " = " << (y) << "\n"; }
-
- void check(const char* x, int y) { cout << x << " = " << (y) << "\n"; }
-
- void check(const char* x, long y) { cout << x << " = " << (y) << "\n"; }
-
- void check(const char* x, double y) { cout << x << " = " << (y) << "\n"; }
-
- void checkb(const char* x, const Fix y)
- {
- cout << x << " = " << (y) << " [" << length(y) << "]"<< "\n";
- }
-
-
-
- int main() {
- cout << "Fix: identities should be displayed\n"
- << "[X] displays the precision of a given value\n"
- << "[*] indicates that the full precision is not used for coding reasons\n";
-
- Fix a; checkb("0 [16]",a);
- Fix b = .5; checkb(".5 [16]",b);
- Fix c(17,-.5); checkb("-.5 [17]",c);
- Fix d(33,.1); checkb(".1 [33]",d);
- Fix e = c; checkb("-.5 [17]",e);
-
- checkb(".3 [16]",a = .3);
- checkb(".5 [16]",a = b);
- checkb(".1 [16]",a = d);
- checkb(".1 [33*]",d = a);
- checkb("-.2 [17]",c = -.2);
- checkb("-.5 [17]",e);
-
- check(".1 [16] == .1 [33*]",a == d);
- d = .1;
- check(".1 [16] == .1 [33]",a == d);
- check(".1 [33] != .5 [16]",d != b);
- check(".1 [33] > .5 [16]",d > b);
- check(".1 [33] <= -.2 [17]",d <= c);
-
- e = .5;
- check("1073741824",mantissa(e).as_double());
- check(".5",value(e));
-
- checkb(".5 [17]",+e);
- checkb("-.5 [17]",-e);
-
- checkb(".1 [33] + .5 [16]",d+b);
- checkb(".1 [33] - .5 [16]",d-b);
- checkb(".1 [33] * .5 [16]",d*b);
- checkb(".1 [33] * 3",d*3);
- checkb(".1 [33] * -3",d*-3);
- checkb("-.1 [33] * 3",(-d)*3);
- checkb("-.1 [33] * -3",(-d)*-3);
- checkb(".5 [17] * -2",e*-2);
- checkb(".1 [33] % 25",d%25);
- checkb(".1 [33] % -25",d%-25);
- checkb(".1 [33] / .5 [16]",d/b);
- checkb(".1 [33] << 1",d<<1);
- checkb("-.1 [33] >> 2",(-d)>>2);
-
- checkb("abs(-.2)",abs(c));
- checkb("abs(.2)",abs(-c));
- check("sgn(-.2)",sgn(c));
- check("sgn(.2)",sgn(-c));
-
- cout << "\nshow .1 [33]\n";
- show(d);
-
- Fix g = .95;
-
- cout << "\nFix: range errors warned\n";
-
- Fix f = 1.1; checkb("1.1 [16]",f);
-
- checkb(".5 [16] / .1 [33]",b/d);
- checkb(".5 [16] / 0. [16]",b/Fix(0.));
- checkb(".5 [17] * 32768",e*32768);
-
- cout << "\nFix: overflows saturated\n";
- set_overflow_handler(Fix_overflow_saturate);
-
- checkb(".95 [16] + .1 [33]",g+d);
- checkb("-.1 [33] - .95 [16]",-d-g);
- checkb(".5 [17] * 2",e*2);
-
- cout << "\nFix: overflows generate warnings\n";
- set_overflow_handler(Fix_overflow_warning);
-
- checkb(".95 [16] + .1 [33]",g+d);
- checkb("-.1 [33] - .95 [16]",-d-g);
- checkb(".5 [17] * 2",e*2);
-
- return 0;
- }
-